The value of 3D ultrasound in the detection of embryonic developmental disorders has become one of the breakthroughs in first trimester sonography.
With surface and transparent mode at around 8 weeks a prominent forehead. upper limbs and the midgut are clearly depicted. At 9 weeks fingers and toes can be visualized as small digital x-ray. The sacral tail protrude causally together with midline cranial ectodermal cleft.
At 10 weeks embryonic face and fingers are clearly shown.
Thus 3D intrauterine sonography provides a novel means for visualization of surface anatomic structures of the human embryo in the uterus and can determine some congenital abnormalities earlier with more clarity and specificity than conversional sonography.
Of most is the precision in which dating of pregnancy can be done , land marks are distinct and even the gestational sac volume measurements can be made with faster and mare accurate ways.
FETAL BACK AND SPINE CAN BE ASSESSED TO EXCLUDE SPINA BIFIDA